Nerve Tissue

Nerve Tissue

the body substance that consists of nerve cells, or neurons, and of auxiliary cells, or neuroglia. Nerve cells are the primary functional units of nerve tissue. In evolution, nerve tissue arose as the neurons combined to form ganglia; it is not found in organisms with a primitive nervous system whose neurons are scattered among the other cells of the body.

The ganglia of invertebrates are usually only externally bathed in hemolymph, and these nutritional conditions account for the structure of invertebrate ganglia. Thus, the cell bodies, or perikarya, of trophic neurons are arranged along the periphery of a ganglion; the ganglionic center is occupied by a neuropil. The most highly developed invertebrate nerve tissue is found in cephalopods, which have a vascular circulatory system that directly supplies the nerve tissue with blood.

Capillary blood circulation in nerve tissue is especially well represented in the vertebrates. The gray matter, composed of neuropils and the cell bodies of neurons, and the white matter, composed mostly of myelinated nerve fibers, constitute the brain and spinal cord in the vertebrates.

AxoGen's portfolio also includes AxoGuard([R]) Nerve Connector, a coaptation aid allowing for close approximation of severed nerves, and AxoGuard([R]) Nerve Protector, a bioscaffold used to reinforce a coaptation site, wrap a partially severed nerve or isolate and protect nerve tissue.

AVANCE Nerve Graft makes it possible for surgeons to repair peripheral nerves without the need for immunosuppression and without the need to transplant nerve tissue from elsewhere in the patient's body.

13] With the development of regenerative medicine, the nerve tissue engineering has developed so rapidly that the abundant biological and artificial nerve grafts can sometimes even replace the autologous nerve transplantation for large nerve defects.

Research published in The American Journal of Pathology shows that one of the protein receptors on white blood cells, CXCR3, brings white blood cells to the optic nerve after damaged nerve tissue produces the binding partner, CXCL10.

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